521112443423130 has 192 divisors, whose sum is σ = 1460424437271072. Its totient is φ = 128158751784960.

The previous prime is 521112443423093. The next prime is 521112443423147. The reversal of 521112443423130 is 31324344211125.

521112443423130 is a `hidden beast` number, since 5 + 2 + 1 + 11 + 244 + 342 + 31 + 30 = 666.

It can be written as a sum of positive squares in 16 ways, for example, as 203764975989129 + 317347467434001 = 14274627^2 + 17814249^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6524222874 + ... + 6524302746.

Almost surely, 2^{521112443423130} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521112443423130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (730212218635536).

521112443423130 is an abundant number, since it is smaller than the sum of its proper divisors (939311993847942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521112443423130 is a wasteful number, since it uses less digits than its factorization.

521112443423130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84833 (or 84830 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 521112443423130 its reverse (31324344211125), we get a palindrome (552436787634255).

The spelling of 521112443423130 in words is "five hundred twenty-one trillion, one hundred twelve billion, four hundred forty-three million, four hundred twenty-three thousand, one hundred thirty".